NOPR Community:

Physical properties of oil-palm leaf fibre

2016-07-20T04:44:35Z

Title: Physical properties of oil-palm leaf fibre Authors: Kalyani, K Lakshmi; Devia, A Sharada Abstract: Oil-palm (Elaesis guineensis) leaf fibres have been extracted, softened with 5% ZnCl₂ and 10% NaOH separately and then studied for their physical properties, such as structure, length, tenacity, torsional rigidity, moisture regain and relative dye uptake. The fibres treated with 10% NaOH alone have been found to be the best as they show minimum decrease in tenacity but maximum increase in crystallinity, extension-at-break, torsional rigidity, moisture regain and dye uptake. Page(s): 99-100

Dyeing of Indian wool with reactive dyes

2016-07-20T04:40:20Z

Title: Dyeing of Indian wool with reactive dyes Authors: Kulkarni, V G Abstract: Wool fibres have been chemically modified by reduction/chlorination under acidic pH /pre-swelling in conc. formic acid prior to their dyeing with indigenous reactive dyes of different molecular configurations to enhance the reactive dye uptake on wool fibre substrate. The pretreatment processes are inexpensive, less harmful and less time consuming as against the use of imported special wool reactive dyes. Page(s): 95-98

Kinetic and thermodynamic studies on red sandalwood

2016-07-20T04:44:04Z

Title: Kinetic and thermodynamic studies on red sandalwood Authors: Gulrajani, M L; Bhaumik, S; Oppermann, W; Hardtmann, G Abstract: Red sandalwood (Pterocarpus santalinus) has been used as a dye for wool and nylon with and without mordant. Ethanol extract of red sandalwood has been used for carrying out thermodynamic and kinetic studies on wool and nylon. The diffusion coefficients, rate of dye uptake, adsorption isotherms, standard affinity, enthalpy and heat of dyeing have been calculated. It is observed that the red sandalwood dye has higher rate of dyeing and more affinity for nylon than those for wool. Page(s): 91-94

Development of protective clothing for pesticide industry: Part I— Assessment of various finishes

2016-07-20T04:43:27Z

Title: Development of protective clothing for pesticide industry: Part I— Assessment of various finishes Authors: Suri, Mona; Rastogi, D; Khanna, K; Chakraborty, M Abstract: A comparative assessment of various commercially available fluorocarbon finishes for their use in protective clothing in pesticide industry has been made. The finishes have been applied on 100% cotton and 70/30 polyester/cotton fabrics at different concentrations and their effect on tensile behaviour, air permeability, stiffness and crease recovery of fabrics studied. The finished fabrics have been evaluated for water and oil repellency. The durability of finishes to laundry has also been assessed. It is observed that the water and oil repellent properties of polyester/cotton blend are better than those of cotton.Finishes A and B perform better than finishes C and D in terms of percentage absorption, permeability of water, oil repellency and tensile strength. Finish A at 40gpl and 60gpl and finish B at 60gpl are recommended for protective clothing as they show maximum improvement in water, oil and pesticide repellency. Page(s): 85-90